//全局常量
//第一层背景移动一次的时间
var   M_background1_move_Time = 30;
var   M_background2_move_Time = 30;
var   M_background3_move_Time = 20;
var   M_background4_move_Time = 20;
var   M_background5_move_Time = 5;
var   M_f_move_Time1 = 3;